Lamp-hanger structure



Nov. 19, 1929. A. J. THOMPSON 1,736,512

LAMP HANGER-STRUGTURE I Filed May 26, 1926 2 Sheets-Sheet l Nov. 19, 1929. A. J. THOMPSON LAMP HANGER STRUCTURE F'rled May 26, 1926 2 Sheets-Shea?I 2 Patented Nov. 19, 1929 ALILIso'N J. THOMPSON, or oLlvLN-n oin'o LAMP-HANGER STRUCTURE Application led May 26,

This invention relates to lamp hanger structures of safety type composed of two principal members, one designed for' permanent mountingat the illuminating location of the lamp, the other member carrying the lamp and reflector and detachably secured with the stationary member and adapted to be lowered therefrom,r as by a chain passing through a 'pulley therein, for replacement or cleaning of the light or reilector.

lThe invention embraces improvements over the general similar structure illustrated and described in my co-pending applications Serial Nos. 4,503 and 61,379, filed Jan. 24, 1.925, and Oct. 8, 1925, respectively, to which reference may be had for a clearer understanding thereof if desired.

Specifically the objects of this invention are the provision in suoli a structure of improved means for mounting the contactors of the lowering member whereby they are self accommodating to the corresponding contactors of the stationary member, and to provide and maintain adequate contacts to completethe lamp circuit inthe raised positionof the lowering member. n

Anotherobj ect of the invention is to make these contacts readily removable when it is desired to replace the lamp, and yet perfectly secured when in position.

A still further object is to provide improved resilient supporting means for the lamp and reiiector whereby maximum lamp life maybe obtained.

And, still further objects of the invention are to provide a construction which shall greatly facilitate wiring and assembling and disassemblingf the parts involved.

Further objects and advantages will be apparent from reference to the following description. taken inconnection with the accompanying drawings in which Fig. 1 is an elevation partly in section showing the general structure, and details of the entire han er; Fig. 2 Aa horizontal section along the ine 2 2, Fig. l; Fig. Suis a similar section along the line 3*-73, Fig. 1; Fig. 50 4 is a vertical section in the plane of line 1926. Serialv No.- 111,745.

4 4, Fig, 2;'and Fig. 5 is a detail taken along Athe line 5-5 of Fig. 3.

As before stated, thehanger structure comprises two principal hanger members, one stationary and adapted `tombe secured in the illuminating position of the lamp, as upon the ceiling, and a lamp carrying hanger detachably secured thereon and lowerable therefrom, as for cleaning or replacement within the frame member 2 is a sleeve 7 to be described.-

Io the end of the chain 6 is secured by a swivel connectioinasby means of washers 12 and Cotter pin 13,- the main lampcarrying hanger member 14 extending, in attached position of the lamp carrying hanger, within the sleeve 7 of the stationary hanger. The sleeve is provided with a longitudinal slot and terminates in a double cam 16 as shown in the drawing, and the lamp carrying hanger member 14 is provided upon the extension with` a lug 15 adapted, as the lamp carrying hangeris raised to engage the cam 16 and enter the slotof the sleeve 7 to rotate Aand position the lamp carrying hanger in proper angular relation with the stationary hanger. Upon the lug 15 is pivotally secured a dog17 adapted in the highest poj sition of the lamp carrying hanger to engage corresponding lugs upon the sleeve 7 to latch thelamp carrying hanger in this position. kThe dog 17 is properly designed and weighted, as described in my co-pending applications referred to so that if the lamp carrying hanger is raised to its highest position by the chain 6, a slow release of the chain will effect engagement of the dog tolatch the lamp carrying hanger, but

-sition. moval of the plate upon release thereof by upon a quick release of the chain the lamp carrying hanger will be returned downwards, all as my prior applications disclose in detail.

Upon the lamp carrying hanger member 14 are a pair of radially extending arms 25 upon each of which is secured an insulating member 26 containing a pair of recesses 27 adapted to receive the ends of a coil spring 28. Midway of each spring 28 is a loop 29 adapted to loosely receive an extension of a contactor 30. The contactors 30 are thus positioned to co-operate in latched position of the lamp carrying hanger, with the contactors 4, the detailed structure of the contactors being described in my co-pending application No. 61,379 to which reference has been made.

The resiliency of each spring 28 is such that the tendency of the ends inserted in the recesses 27 is to grip the sides ofthe recesses and thereby securely position the spring. A projection 31 upon each of the insulators 26, extending between adjacent portions of the spring 28 on the one hand, and the lamp carrying hanger and stationary hanger on the other hand, limits motion ofthe spring and provides a safety barrier between the live contactors and the metal frame of either of the hanger members.

In the lower portion of the lamp carrying hanger member 14 is secured a bell shaped or canopy member 18, closed at its upper end to eliminate the possibility of dropping any of the chain securing elements described and provided inwardly of its lower edgev with spaced projections 19 of angular surface as 'indicated in the drawings. In the mouth of the canopy is an apertured plate or disk member 2O provided with notched lugs corresponding with the projections 19 Vfor engagement therewith to maintain the plate in po- Spaces between the lugs allow relifting it from the projections 19 and rotating it to clear the same. Uponthe upper surface of the plate is a circular positioning rib 21 and upon the plate about this rib is seated a tapering helical spring 22, upon the upper coil of which is positioned by means of the ange' orhead 10, the generally tubular lamp carrying member 38. Upon the lower portion ofthe lamp carrying member kis secured lamp receiving means 39 provided near its upper end with lateral openings 11; and which may comprise the usual lamp socket and reflector. Inwardly of the aperture of the plate 20 are oppositely spaced notched lugs 23 adapted to co-operate with corresponding longitudinally extending projections 24 upon the lamp carrying member 38 to fix the angular relation between the plate and lamp carryinghanger and also the lamp carrying member 38.

The spring 22 is of such strength as to be somewhat compressed when bearing the weight of the lamp and reflector so that the lamp carrying member 38 floats upon the spring clear of the canopy 18; the lamp supporting member being shown in Fig. 1 bear-, ing against the canopy, as though there were no depending weights. By the tapering helical conformation of the spring its lower convolutions are the most yieldable, responding readily to a light lamp, rendering the spring self-accommodating to the varying loads upon it.

From an attachment upon each of the contactors 30 beneath the loop of the spring 28, extends a wire 32 leading beneath the canopy 18 up through the dog 2O through the lateral opening 11 in the lamp carrying member 38 and downward through the lamp carrying lmember to the lamp receptacle; so that in latched position of the lamp carrying hanger a circuit through the lamp is completed be large opening in the disk allows free play of the wires when so positioned. Upon the lower surface of the plate I provide gripping means such as the rib 8, their function being as follows: In assembling the plate Within the canopy, the plate is placed in angular relation to the canopy such that its projections 19 clear the lugs upon the plate. The thumbs of the assembler are positioned upon the ribs 8 and the plate being moved in to the canopy against the pressure of spring 22 and is then rotated to the angular position shown in Fig. 3 and released to the effect of spring 22, which forces the parts into the engaged position shown. The sides of the projections 19 converge, and the notches in the lugs of the disk correspond, as indicated in the drawings, to assist alignment in assembly.

The contactors 30, being loosely mounted within the loops of the springs 28 are self accommodating to the contactors 4 in engagement therewith; the play allowed by the loose connection with the springs together with the resilience of the springs allowing a perfect contact to be effected.

In assembling the springs 28 upon the insulator 26 the spring is merely grasped longitudinally between the thumb and forefinger to align the ends thereof with the recesses 27, thrust into the recesses, and released; the tension of the spring thereafter maintaining such position.

What I claim is:

1. In a device of the character described,

the combination of a lamp carrying hanger member, an insulator carried thereby and having a recess, a metal spring having a portion seating in said recess whereby said spring is supported by said insulator and an arm portion extending transversely of said recess, and a conductor-receiving contactor carried by said spring arm portion for yielding engagement with a cooperating contactor.

2. In a device of the character described, the combination of a lamp carrying hanger member, an insulator carried thereby and having recesses, a metal spring having ends seating in said recesses and having a loop, and a conductor-receiving contactor secured in said loop.

3. In a device of the character described, the combination of a lamp carrying hanger member, an insulator carried thereby and having recesses, a metal spring having ends seating in said recesses and having a loop, and a conductor-receiving contactor loosely secured in said loop for self-accommodating adjustment to a cooperating contactor.

4. In a device of the character described, the combination of a lamp carrying hanger member, an insulator carried thereby and having recesses, a metal spring having ends seating in said recesses, a loop, and convolutions between said ends and the loop, said convolutions being adapted to urge said ends toward engagement with the sides of said recesses, and a conductor-receiving contactor secured in said loop.

5. In a device of the character described, the combination of a lamp carrying hanger member, an insulator carried thereby and having recesses, a metal spring having ends seating in said recesses, a loop, and convolutions between said ends and the loop, said convolutions being adapted to urge sa1d ends toward engagement with the sides of said recesses, and a conductor-receiving contacter secured in said loop, said insulator having a projecting portion extending adjacent said spring convolutions on the hanger member side thereof.

In testimony whereof I hereby aiX my signature.

ALLISON J. THOMPSON. 

